Americans spend more than $100 billion a year on ways to lose weight, but it doesn't happen. Next year, the same people will probably spend more. People appear not to care if they don't get the product they pay for. What social, cultural and personal factors explain this?
美国人每年花在减肥用途的费用超过1000亿美元,但是没有效果。明年,相同的人可能会花更多的钱来减肥。人们似乎并不在意他们不让他们付出代价的却没有实效产品。什麽样的社会、文化和个人因素解释这个?
哪位好心的大大，可以告诉我如何回答，至少给出要点嘛，谢谢了